Spinal Cord Lead Anchor with Twist-Lock Mechanism
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Solution Overview
Problem
Existing lead anchors for spinal cord modulation systems often allow lead movement, reducing the accuracy and effectiveness of neurological stimulation therapies by failing to securely retain the leads while also limiting their repositionability.
Innovation Solution
A lead anchor system featuring a central lumen surrounded by a restriction feature that interfaces with a tightening screw, providing a compressive fit and allowing for secure attachment and subsequent repositioning of the lead through a twisting unlocking mechanism, along with various embodiments including multiple apertures, shape-memory materials, and securement devices like clamshell configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing lead anchors are used to secure the lead, then the lead is retained in position, but the lead cannot be repositioned if a different position is needed for effective therapy
Solution Approach 1:
The lead anchor system transitions from a static fixed state to a dynamic adjustable state through the actuator mechanism. The actuator can be activated to change the restriction feature from a constrained configuration (securing the lead) to a released configuration (allowing lead movement), enabling both reliable retention and repositionability as needed
2Measurement precision
If the lead is securely fixed to prevent movement, then stimulation accuracy is maintained, but the procedure time increases due to inability to easily reposition
Solution Approach 1:
The dynamic actuation mechanism allows the system to maintain secure fixation during the initial positioning phase to ensure stimulation accuracy, then quickly transition to a released state if repositioning is needed, minimizing procedure time while preserving precision when required
3Reliability
If a tightening screw is used to provide compressive fit on the lead, then the lead is securely retained, but the device complexity increases
Solution Approach 1:
The restriction feature's mechanical properties are changed through actuation - transitioning from a relaxed state to a compressed state that applies radial force to the lead. This parameter change (from uncompressed to compressed) enables secure retention without requiring a completely separate fastening mechanism
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively inhibits lead migration, enhances treatment accuracy, and allows for repositioning without reimplantation, reducing procedure time and improving placement precision, thereby addressing the limitations of traditional anchor systems.
Implementation Method 1
the restriction feature is formed from a shape-memory material and can be heated to transform from a first configuration in which the lead is secured to a second configuration in which the lead is released
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
The present technology is directed generally to a lead anchor for positioning and securing spinal cord modulation leads and associated systems and methods. In at least some contexts, the lead anchor includes a central lumen surrounded by a restriction feature. The restriction feature can interface with a tightening screw or other actuator and can be configured to provide a radial compressive fit around the lead body. In some embodiments, the clamp can be disengaged upon twisting or other unlocking motion to release the lead.